class Settings():
    """ 存储《外星人入侵》 的所有设置的类"""

    def __init__(self):
        """初始化游戏的设置"""

        # screen setting
        self.screen_width = 1200
        self.screen_height = 600
        self.bg_color = (230, 230, 230)
        self.ship_limit = 3

        # Bullet设置
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = (60, 60, 60)
        self.bullet_allowed = 10

        # 外星人设置
        self.fleet_drop_speed = 10

        # 加快节奏
        self.speedup_scale = 1.1
        # 外星人点数的提高速度
        self.score_scale = 1.5

        self.initialize_dynamic_settings()

    def initialize_dynamic_settings(self):
        """初始化随游戏进行的设置"""
        self.bullet_speed_factor = 10

        # 外星人设置（fleet_direction为1表示向右移，为-1表示向左移）
        self.alien_speed_factor = 1.5
        self.fleet_direction = 1

        self.ship_speed_factor = 5
        # 每击杀一个外星人得分
        self.alien_points = 50

    def increase_speed(self):
        """加快游戏节奏"""
        self.ship_speed_factor *= self.speedup_scale
        self.bullet_speed_factor *= self.speedup_scale
        self.alien_speed_factor *= self.speedup_scale
        self.alien_points = int(self.alien_points * self.score_scale)
        print(self.alien_points)
